lance armstrong comes clean after years of denials. now the consequences for him, for the cancer charity he founded, even the future of his sport at the olympics. >>> late word on the action the president plans to take on gun control tomorrow. >>> fighting the flu. what are the real odds of getting sick after getting the flu shot, which in some places is getting a lot harder to find. >>> and cashing out. an alarming number of americans draining the money they were saving for retirement to pay the bills right now. >>> also tonight, our inspiring "making a difference" report. "nightly news" begins now. >>> from nbc news world headquarters in new york, this is "nbc nightly news" with brian williams. >>> good evening. shortly before air time tonight, we learned about what the president plans to announce rr